/Engine/Source/Runtime/PakFile/Public/IPlatformFilePak.h
Calls the given Visitor on every FileName in the Pruned DirectoryIndex. FileNames passed to the Vistory are the RelativePath from the Mount of the PakFile The Pruned DirectoryIndexat Runtime contains only the DirectoryIndexKeepFiles-specified subset of FilesNames and DirectoryNames that exist in the PakFile
virtual void PakVisitPrunedFilenames ( [IPlatformFile::FDirectoryVisitor](API\Runtime\Core\GenericPlatform\IPlatformFile\FDirectoryVisitor) & Visitor ) const